Return-Path: X-Spam-DCC: paranoid 1481; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id uA2KAVkq025719 for ; Wed, 2 Nov 2016 21:10:31 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1c21p8-0003Sz-KM for rs_out_1@blacksheep.org; Wed, 02 Nov 2016 20:07:50 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1c21p7-0003Sq-Tz for rsgb_lf_group@blacksheep.org; Wed, 02 Nov 2016 20:07:49 +0000 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1c21p5-0001dX-EI for rsgb_lf_group@blacksheep.org; Wed, 02 Nov 2016 20:07:48 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 3160120A38 for ; Wed, 2 Nov 2016 21:07:45 +0100 (CET) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3t8K003B0Cz105k for ; Wed, 2 Nov 2016 21:07:44 +0100 (CET) Message-ID: <581A4790.2070206@posteo.de> Date: Wed, 02 Nov 2016 21:07:44 +0100 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <154c32c4dba-373a-24653@webprd-m58.mail.aol.com> <573CAF79.9040701@abelian.org> <573CBBF0.4030701@posteo.de> <573E5907.6020107@posteo.de> <573EA094.3040205@abelian.org> <573EF90F.1080201@posteo.de> <573FC4DA.3080107@abelian.org> <5740842D.3030000@posteo.de> <5744FA27.6010703@posteo.de> <57F56531.3060205@posteo.de> <5817DE39.9010506@posteo.de> <5818DDAB.7000804@abelian.org> <5819E3AA.3020906@posteo.de> <581A452F.6060506@abelian.org> In-Reply-To: <581A452F.6060506@abelian.org> X-Scan-Signature: c0336009bd9bab526ca27d297ea7579a Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Content-Length: 1194 Status: O X-Status: X-Keywords: X-UID: 9356 Hello Paul, Excellent, another very good result! :-) But now, we are already at -0.2 dB. Would you think a 11 character message will decode? If the reference phase was constant, could we afford a 2 hour longer transmission time, e.g. 6...18 UTC? Can you provide a bit error image (you know what i mean) for the last decode? It would be interesting to see how the errors are spread. 73, Stefan Am 02.11.2016 20:57, schrieb Paul Nicholson: > > Stefan wrote: > > > f = 6470.00000 Hz > > Start time: 02.11.2016 07:00:00 UTC > > Symbol length: 30 s > > Characters: 7 > > CRC 16 > > Coding 16K25A > > Duration: 10h, 56m, 0s > > Antenna current: ~ 280 mA > > Copied 'SUCCESS' at Eb/N0 = -0.2 dB BER 40.5%. > > Constant reference phase. > > Carrier S/N 15.5 dB in 25.4 uHz. > -64.4 dB in 2500 Hz after sferic blanking. > > I was expecting to decode at about +1.2dB based on > yesterday's S/N ratio. Today must have been a little > noisier and I had to use a more aggressive blanker > setting to maximise the Eb/N0. > > Uwe wrote: > > > EbNaut RX V0,4d tells me “Error: Not enough memory (trellis)”. > > You'll need a spare 22 GByte of RAM to decode this one. > > -- > Paul Nicholson > -- >